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신현무,윤삼석,이창언 慶星大學校 環境問題硏究所 2002 環境硏報 Vol.12 No.1
In order to evaluate the characteristics of heavy metal adsorption to soil, three kinds of heavy metals (Pb,Cu,Cd), commonly existing in abandoned mine area, were selected and use for adsorption experiments. Through the adsorption kinetics, Cu^2+ and Cd^2+ were reached to pseudo-equilibrium state within I hour, whereas Pb^2+ was within 3 hours. The result of adsorption isotherm demonstrated that the Freundlich model was more suitable than Langumuir in explanation of selected metals adsorption and K_F value was in the order of Pb^2+> Cu^2+> Cd^2+. All selected metals adsorbed to soil more than 80% in the range of pH above 4.
Cu, Pb, 및 Cd로 오염된 토양의 동전기적 방법에 의한 제거에 있어 중금속 종이 미치는 영향
신현무,윤삼석 한국환경과학회 2004 한국환경과학회지 Vol.13 No.1
Three kinds of toxic heavy metals, such as lead, copper, and cadmium, existing abundantly in contaminated soils were selected to investigate pH change, electroosmotic flow, and the removal rate in the application of electrokinetic process. In the change of pHs, they reached to about 12 and 2 at each cathodic and anodic region, respectively, and maintained for reaction being proceeded. Electroosmotic flow rates were not influenced by the kind of metal species but by electropotential gradient. On the soils contaminated by each metal, the removal rate of Cd was the fastest among three as in the order of Cd>Pb>Cu. While on the soils contaminated by mixed metal species, Cu was the fastest. Metal species transported by electrokinetic processes were distributed in between 0.9 and 1.0 of normalized region. In the case of soils contaminated by one kind of metal. the relative concentrations of Pb and Cd estimated in between normalized region 0.9 and 1.0 were 5.2 and 5.7, respectively.